CN115134417B - IEC 61850-based data conversion method and device for primary equipment of power system - Google Patents

Abstract

The invention discloses a data conversion method and device for primary equipment of the power system based on IEC61850, which collects sampling data of primary equipment of the power system in real time; and maps the sampling data from the OPC UA standard that complies with the application layer to the data link layer that complies with it. The TSN standard is used to obtain OPC UA data; the OPC UA data is mapped to MMS data, and the SV data is converted into MMS data that can be recognized by IEC61850 based on the OPC UA Over TSN technology without destroying the original IEC61850 transmission architecture. It provides guarantee for the collection and transmission of SV data and improves the execution efficiency of MMS data, thus improving the real-time and reliability of SV data transmission.

Description

A data conversion method for power system primary equipment based on IEC61850 and device

Technical field

The present invention relates to the technical field of data conversion, and in particular to a data conversion method and device for primary equipment of a power system based on IEC61850.

Background technique

With the advancement of industrial Internet technology, more and more intelligent instruments and meters are being applied to the production and operation process of the power system, further promoting the integration of primary equipment and intelligent instruments and meters in the power system, making the connection between the power system and intelligent instruments and meters The frequency of information interaction is gradually increasing, which also leads to the upper-layer system to put forward higher requirements for the semantic understanding of intelligent terminal devices from different manufacturers. OPCUA (OLE for Process Control Unified Architecture, used for object connection and embedding of process control) is a standard for the application layer. It provides a standard data transmission interface for data through a common API, ensuring mutual recognition of data between horizontal devices. As well as data interoperability between vertical systems, it breaks the traditional automation pyramid transmission model and realizes data interconnection, interoperability and semantic interoperability from the field layer, control layer, management layer to the cloud.

At the same time, considering that OPCUA itself is not time-sensitive, in order to ensure the certainty of data stream transmission, a Time Sensitive Network (TSN) needs to be introduced at the data link layer. TSN includes an IEEE802.1 protocol cluster, which can Provide deterministic time slots and delays for data transmission, including clock synchronization, resource reservation and deterministic scheduling, etc., ensuring the real-time and deterministic nature of internal control instructions in the power system.

At present, communication between power systems is based on the IEC61850 standard and provides a three-layer, two-network architecture. However, after the introduction of OPC UA Over TSN smart sensing terminals, it was not considered that the data received by the isolation layer cannot be converted into energy. Problem with MMS data recognized by the station control layer.

Contents of the invention

The technical problem to be solved by the present invention is to provide a data conversion method and device for primary equipment of a power system based on IEC61850, which can improve the real-time and reliability of the transmission of sampled data.

In order to solve the above technical problems, a technical solution adopted by the present invention is:

A data conversion method for primary equipment in power systems based on IEC61850, including the steps:

Collect sampling data from primary equipment in the power system;

Map the sampled data from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer to obtain OPC UA data;

The OPC UA data is mapped to MMS data.

In order to solve the above technical problems, another technical solution adopted by the present invention is:

A data conversion device for power system primary equipment based on IEC61850, including:

Data acquisition module, used to collect sampling data of primary equipment in the power system;

The first mapping module is used to map the sampled data from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer to obtain OPC UA data;

The second mapping module is used to map the OPC UA data into MMS data.

Further, the first mapping module is further used to:

Encapsulate the sampled data according to the OPC UA standard of the application layer to obtain encapsulated sampled data;

The encapsulated sampling data is encapsulated according to the TSN standard of the data link layer to obtain OPC UA data.

Further, the second mapping module is further used to:

Perform protocol identification on the OPC UA data to obtain the identified OPC UA data;

Perform integrity verification on the identified OPC UA data to obtain the first verification result;

Determine whether the first verification result is data complete, and if so, perform protocol conversion on the identified OPC UA data to obtain MMS data.

Further, the second mapping module is further used to perform protocol identification on the OPC UA data. The identified OPC UA data includes:

Perform integrity verification on the OPC UA data to obtain a second verification result;

Determine whether the second verification result is data complete, and if so, perform protocol detection on the OPC UA data to obtain a detection result;

Determine whether the detection result is that the detection has passed. If so, store the OPC UA data in a cache queue and decode the OPC UA data to obtain the identified OPC UA data.

Further, the second mapping module is further used to perform protocol conversion on the identified OPC UA data, and the obtained MMS data includes:

The identified OPC UA data is encapsulated according to the MMS data format to obtain MMS data;

Perform integrity verification on the MMS data to obtain a third verification result;

Determine whether the third verification result is data complete, and if so, cache the MMS data.

The beneficial effect of the present invention is to map the collected sampling data (SimpleValue, SV) of the primary equipment of the power system from the OPC UA standard in compliance with the application layer to the TSN standard in compliance with the data link layer, obtain OPC UA data, and convert the OPC UA The data is mapped to MMS data. This technology based on OPC UA Over TSN converts SV data into MMS data that can be recognized by IEC61850 without destroying the original IEC61850 transmission architecture. It provides guarantee for the collection and transmission of SV data and improves the efficiency of SV data collection and transmission. MMS data execution efficiency, thereby improving the real-time and reliability of SV data transmission.

Description of the drawings

Figure 1 is a step flow chart of a data conversion method for primary equipment in a power system based on IEC61850 according to an embodiment of the present invention;

Figure 2 is a schematic structural diagram of a data conversion device for power system primary equipment based on IEC61850 according to an embodiment of the present invention;

Figure 3 is a schematic structural diagram of the power system in the data conversion method for primary equipment of the power system based on IEC61850 according to the embodiment of the present invention;

Figure 4 is a schematic diagram of the OPCUA address space in the data conversion method for power system primary equipment based on IEC61850 according to the embodiment of the present invention;

Figure 5 is a schematic diagram of SV data encapsulation in the data conversion method for power system primary equipment based on IEC61850 according to an embodiment of the present invention;

Figure 6 is a schematic diagram of OPCUA Over TSN mapping in the data conversion method for power system primary equipment based on IEC61850 according to an embodiment of the present invention;

Figure 7 is a schematic diagram of OPCUA data to MMS data conversion in the data conversion method for power system primary equipment based on IEC61850 according to the embodiment of the present invention;

Figure 8 is a schematic diagram of the data conversion module in the data conversion method for primary equipment of a power system based on IEC61850 according to an embodiment of the present invention;

Figure 9 is a schematic diagram of the protocol identification unit in the data conversion method for power system primary equipment based on IEC61850 according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a protocol conversion unit in the data conversion method for primary equipment of a power system based on IEC61850 according to an embodiment of the present invention.

Detailed ways

In order to describe the technical content, achieved objectives and effects of the present invention in detail, the following description will be made in conjunction with the embodiments and the accompanying drawings.

Referring to Figure 1, an embodiment of the present invention provides a data conversion method for primary equipment in a power system based on IEC61850, including the steps:

Collect sampling data from primary equipment in the power system;

Map the sampled data from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer to obtain OPC UA data;

The OPC UA data is mapped to MMS data.

As can be seen from the above description, the beneficial effect of the present invention is to map the collected sampling data (Simple Value, SV) of the primary equipment of the power system from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer, and obtain the OPC UA data, maps OPC UA data to MMS data, and uses OPC UA Over TSN technology to convert SV data into MMS data that can be recognized by IEC61850 without destroying the original IEC61850 transmission architecture, providing information for the collection and transmission of SV data. This guarantees and improves the execution efficiency of MMS data, thus improving the real-time and reliability of SV data transmission.

Further, mapping the sampled data from the OPC UA standard conforming to the application layer to the TSN standard conforming to the data link layer to obtain the OPC UA data includes:

Encapsulate the sampled data according to the OPC UA standard of the application layer to obtain encapsulated sampled data;

The encapsulated sampling data is encapsulated according to the TSN standard of the data link layer to obtain OPC UA data.

As can be seen from the above description, the SV data is encapsulated according to the OPC UA standard of the application layer, and the encapsulated SV data is re-encapsulated according to the TSN standard of the data link layer to obtain OPC UA data. The data link layer TSN standard includes IEEE802. 1 protocol cluster, which can provide clock synchronization, resource reservation and deterministic scheduling for SV data, thereby effectively realizing the conversion of SV data to OPC UA data and facilitating subsequent conversion into MMS data.

Further, mapping the OPC UA data to MMS data includes:

Perform protocol identification on the OPC UA data to obtain the identified OPC UA data;

Perform integrity verification on the identified OPC UA data to obtain the first verification result;

Determine whether the first verification result is data complete, and if so, perform protocol conversion on the identified OPC UA data to obtain MMS data.

As can be seen from the above description, the mapping of OPC UA data to MMS data requires protocol identification, data verification and protocol conversion. This achieves data conversion, improves the real-time performance of data transmission in power plants using the IEC61850 standard, and ensures data The reliability of interaction effectively avoids data discarding or retransmission caused by congestion or protocol non-recognition during the data interaction process.

Further, performing protocol identification on the OPC UA data, and obtaining the identified OPC UA data includes:

Perform integrity verification on the OPC UA data to obtain a second verification result;

Determine whether the second verification result is data complete, and if so, perform protocol detection on the OPC UA data to obtain a detection result;

Determine whether the detection result is that the detection has passed. If so, store the OPC UA data in a cache queue and decode the OPC UA data to obtain the identified OPC UA data.

It can be seen from the above description that in the process of protocol identification of OPC UA data, data verification, protocol detection and data decoding are required to ensure the reliability of the data.

Further, performing protocol conversion on the identified OPC UA data to obtain MMS data includes:

The identified OPC UA data is encapsulated according to the MMS data format to obtain MMS data;

Perform integrity verification on the MMS data to obtain a third verification result;

Determine whether the third verification result is data complete, and if so, cache the MMS data.

As can be seen from the above description, the identified OPC UA data is encapsulated according to the MMS data format to obtain the MMS data, and the integrity of the MMS data is verified. When the verification result is that the data is complete, the MMS data is cached, achieving reliable and effective Ground data conversion allows the intelligent monitoring terminal at the station control layer to analyze and process MMS data, thereby improving the real-time and reliability of SV data transmission.

Please refer to Figure 2, a data conversion device for power system primary equipment based on IEC61850, including:

Data acquisition module, used to collect sampling data of primary equipment in the power system;

The first mapping module is used to map the sampled data from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer to obtain OPC UA data;

The second mapping module is used to map the OPC UA data into MMS data.

As can be seen from the above description, the beneficial effect of the present invention is to map the collected sampling data (Simple Value, SV) of the primary equipment of the power system from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer, and obtain the OPC UA data, maps OPC UA data to MMS data, and uses OPC UA Over TSN technology to convert SV data into MMS data that can be recognized by IEC61850 without destroying the original IEC61850 transmission architecture, providing information for the collection and transmission of SV data. This guarantees and improves the execution efficiency of MMS data, thus improving the real-time and reliability of SV data transmission.

Further, the first mapping module is further used to:

Encapsulate the sampled data according to the OPC UA standard of the application layer to obtain encapsulated sampled data;

The encapsulated sampling data is encapsulated according to the TSN standard of the data link layer to obtain OPC UA data.

As can be seen from the above description, the SV data is encapsulated according to the OPC UA standard of the application layer, and the encapsulated SV data is re-encapsulated according to the TSN standard of the data link layer to obtain OPC UA data. The data link layer TSN standard includes IEEE802. 1 protocol cluster, which can provide clock synchronization, resource reservation and deterministic scheduling for SV data, thereby effectively realizing the conversion of SV data to OPC UA data and facilitating subsequent conversion into MMS data.

Further, the second mapping module is further used to:

Perform protocol identification on the OPC UA data to obtain the identified OPC UA data;

Perform integrity verification on the identified OPC UA data to obtain the first verification result;

Determine whether the first verification result is data complete, and if so, perform protocol conversion on the identified OPC UA data to obtain MMS data.

As can be seen from the above description, the mapping of OPC UA data to MMS data requires protocol identification, data verification and protocol conversion. This achieves data conversion, improves the real-time performance of data transmission in power plants using the IEC61850 standard, and ensures data The reliability of interaction effectively avoids data discarding or retransmission caused by congestion or protocol non-recognition during the data interaction process.

Further, the second mapping module is further used to perform protocol identification on the OPC UA data. The identified OPC UA data includes:

Perform integrity verification on the OPC UA data to obtain a second verification result;

Determine whether the second verification result is data complete, and if so, perform protocol detection on the OPC UA data to obtain a detection result;

Determine whether the detection result is that the detection has passed. If so, store the OPC UA data in a cache queue and decode the OPC UA data to obtain the identified OPC UA data.

It can be seen from the above description that in the process of protocol identification of OPC UA data, data verification, protocol detection and data decoding are required to ensure the reliability of the data.

Further, the second mapping module is further used to perform protocol conversion on the identified OPC UA data, and the obtained MMS data includes:

The identified OPC UA data is encapsulated according to the MMS data format to obtain MMS data;

Perform integrity verification on the MMS data to obtain a third verification result;

Determine whether the third verification result is data complete, and if so, cache the MMS data.

As can be seen from the above description, the identified OPC UA data is encapsulated according to the MMS data format to obtain the MMS data, and the integrity of the MMS data is verified. When the verification result is that the data is complete, the MMS data is cached, achieving reliable and effective Ground data conversion allows the intelligent monitoring terminal at the station control layer to analyze and process MMS data, thereby improving the real-time and reliability of SV data transmission.

The above-mentioned data conversion method and device for power system primary equipment based on IEC61850 of the present invention can be applied to power system primary equipment. The specific implementation will be described below:

Embodiment 1

Please refer to Figure 1, Figure 3 to Figure 10. As shown in Figure 3, IEC61850 is a three-layer, two-network communication architecture, including the process layer, isolation layer and station control layer. The two layers are communicated by the communication network, and the process layer is The power system is composed of primary equipment, which is the actual operating power system; the isolation layer is composed of sensors and transformers based on the OPC UA standard, which is used to complete data collection and issue control instructions; the station control layer is composed of a monitoring host for Complete real-time monitoring of the power system; among them, a large number of measurement information merging units and intelligent terminals used to complete command issuance are included between the isolation layer and the process layer; a monitoring device is included between the station control layer and the isolation layer; in actual During operation, the primary equipment of the power system sends sampling data such as current, voltage and frequency to the isolation layer through the merging unit. The station control layer monitors the data information of the isolation layer and issues control instructions through the isolation layer. Finally, the intelligent terminal executes the control of the power system. An operation of the equipment;

A data conversion method for primary equipment in a power system based on IEC61850 in this embodiment includes the steps:

S1. Collect sampling data of primary equipment in the power system;

Specifically, smart sensors equipped with the OPC UA standard are used to collect the sampling data (Simple Value, SV) of the power system primary equipment at the process layer in real time. The SV data includes equipment attributes, equipment standard parameters, voltage, current, protection actions and other information. , based on the SV data, the OPC UA address space is constructed at the isolation layer through the merging unit, and the information model of the power primary equipment is generated. As shown in Figure 4, it represents the voltage and current collected in real time by the OPC UA sensor configured on the primary equipment side of the power system. and frequency and other information; since OPC UA is a standard located at the application layer, and the SV data in IEC61850 is located at the data link layer, the OPC UA data needs to be re-encapsulated, as shown in Figure 4, taking the generator as an example, including Device attributes, such as voltage, current, frequency, etc., are dynamic SV data collected by OPC UA sensors; in addition, device functions also include static SV data such as start, stop, braking, etc.

S2. Map the sampled data from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer to obtain OPC UA data, as shown in Figures 5 and 6;

Wherein, the mapping includes direct mapping and indirect mapping. The direct mapping is that the data is mapped directly from the application layer to the data link layer without passing through the transport layer and the network layer. The indirect mapping is that the data is mapped from the application layer through the transport layer and the network layer. The network layer is then mapped to the data link layer. In this embodiment, the mapping is direct mapping;

Specifically, the sampled data is directly mapped from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer to obtain OPC UA data. As shown in Figure 6, in order to ensure that the data between the isolation layer and the station control layer For real-time transmission, TSN technology is introduced at the data link layer, including:

S21. Encapsulate the sampling data according to the OPC UA standard of the application layer to obtain the encapsulated sampling data;

Specifically, the header and tail of the OPC UA standard of the application layer are added to the beginning and end of the SV data to obtain the encapsulated SV data;

S22. Encapsulate the encapsulated sampling data according to the TSN standard of the data link layer to obtain OPC UA data;

Specifically, add the header and tail of the TSN standard of the data link layer to the beginning and end of the encapsulated SV data to obtain OPC UA data, and transmit the OPC UA data to the data conversion module;

Wherein, the transmission includes wired transmission corresponding to the direct mapping and wireless transmission corresponding to the indirect mapping. The wired transmission is suitable for the TCP/IP mode in the direct mapping mode, and the wireless transmission is suitable for the indirect mapping. In the UDP/IP mode, in this embodiment, the transmission is wired transmission;

S3. Map the OPC UA data to MMS data, as shown in Figure 7 and Figure 8:

S3 is executed by the data conversion module; the OPCUA data mapping to MMS data is a 5-layer mapping, both of which are in the application layer of ISO/OSI, ensuring data compatibility with the original IEC61850;

Wherein, the OPC UA data consists of application layer, transport layer, network layer, data link layer and physical layer; the MMS data consists of application layer, transport layer, network layer, data link layer and physical layer, such as As shown in Figure 7, first, the OPC UA data located at the application layer passes through the transport layer and is TCP encapsulated in the original OPC UA data header, and then passes through the network layer IP encapsulation and data link layer TSN encapsulation, and finally reaches the physical layer; secondly, the data The data conversion module converts it into MMS data that can be recognized by IEC61850; finally, it reaches the application layer through the physical layer, data link layer, network layer, and transport layer. The MMS data will be identified and parsed, including:

S31. Perform protocol identification on the OPC UA data, and obtain the identified OPC UA data, which specifically includes:

S311. Perform integrity verification on the OPC UA data to obtain the second verification result;

Specifically, the CRC verification method is used to perform integrity verification on the OPC UA data to obtain the second verification result, which specifically includes:

S3111. Use CRC polynomial to determine the supplementary check bit of the OPC UA data;

S3112. Perform a remainder operation on the OPC UA data and the CRC polynomial to obtain a CRC check sequence, and fill the CRC check sequence into the supplementary check bits to obtain the filled OPC UA data;

S3113. Determine whether the supplementary check bit is 0. If so, determine that the second check result is that the data is complete. If not, determine that the second check result is that the data is incomplete;

S312. Determine whether the second verification result is complete data. If yes, execute S3121; if not, execute S3122;

S3121. Perform protocol detection on the OPC UA data and obtain detection results;

Specifically, determine whether the OPC UA data is OPC UA data. If so, determine that the detection result is that the detection passed; if not, determine that the detection result is that the detection failed;

S3122. Discard the OPC UA data with incomplete data, re-obtain the OPC UA data from the OPC UA address space and return to execute S311;

S313. Determine whether the detection result is that the detection has passed. If yes, execute S3131; if not, execute S3132;

S3131. Store the OPC UA data in the cache queue, and decode the OPC UA data to obtain the identified OPC UA data. The decoding can parse out the data information transmitted by the OPC UA data;

S3132. Filter the OPC UA data that fails the detection, and maintain the monitoring state, waiting for the arrival of new data;

S32. Perform integrity verification on the identified OPC UA data to obtain the first verification result;

Specifically, determine whether the identified OPC UA data is complete; if so, determine that the first verification result is that the data is complete; if not, determine that the first verification result is that the data is incomplete;

S33. Determine whether the first verification result is complete data. If yes, execute S331; if not, execute S332;

S331. Perform protocol conversion on the identified OPC UA data to obtain MMS data, which specifically includes:

S3311. Encapsulate the identified OPC UA data according to the MMS data format to obtain MMS data;

S3312. Perform integrity verification on the MMS data to obtain the third verification result;

Specifically, it is determined whether the data information of the MMS data is consistent with the data information of the identified OPC UA data. If so, it is determined that the third verification result is that the data is complete. If not, it is determined that the third verification result is incomplete data;

S3313. Determine whether the third verification result is that the data is complete. If so, cache the MMS data; if not, return to S311;

S332. Return to execution S311;

As shown in Figure 8, the data conversion module includes a protocol identification unit, a data verification unit and a protocol conversion unit. S31 implements protocol identification, S32 implements data verification, and S331 implements protocol conversion. As shown in Figure 9, the protocol identification unit includes data Verification, protocol detection and data decoding, S311 implements data verification of the protocol identification unit, S3121 implements protocol detection of the protocol identification unit, and S3131 implements data decoding of the protocol identification unit; as shown in Figure 10, the protocol conversion unit includes data encoding, Data verification and protocol conversion, S3311 implements the data encoding of the protocol conversion unit, S3312 implements the data verification of the protocol conversion unit, and S3313 implements the protocol conversion of the protocol conversion unit;

After the MMS data is obtained, it can be parsed by the monitoring host at the station control layer to facilitate the accurate issuance of control instructions. The control instructions reach the process layer through the isolation layer and are used to adjust the operation of primary equipment in the power system. OPC UA OverTSN technology can be used Provide better real-time performance and accuracy for the interaction between the isolation layer and the station control layer.

Embodiment 2

Please refer to Figure 2. In this embodiment, a data conversion device for power system primary equipment based on IEC61850 includes:

Data acquisition module, used to collect sampling data of primary equipment in the power system;

The first mapping module is used to map the sampled data from the OPC UA standard that complies with the application layer to the TSN standard that complies with the data link layer to obtain OPC UA data;

The second mapping module is used to map the OPC UA data into MMS data;

In an optional implementation, the first mapping module is further used to:

Encapsulate the sampled data according to the OPC UA standard of the application layer to obtain encapsulated sampled data;

Encapsulate the encapsulated sampled data according to the TSN standard of the data link layer to obtain OPC UA data;

In an optional implementation, the second mapping module is further used to:

Perform protocol identification on the OPC UA data to obtain the identified OPC UA data;

Perform integrity verification on the identified OPC UA data to obtain the first verification result;

Determine whether the first verification result is data complete, and if so, perform protocol conversion on the identified OPC UA data to obtain MMS data;

In an optional implementation, the second mapping module is further used to perform protocol identification on the OPC UA data. The identified OPC UA data includes:

Perform integrity verification on the OPC UA data to obtain a second verification result;

Determine whether the second verification result is data complete, and if so, perform protocol detection on the OPC UA data to obtain a detection result;

Determine whether the detection result is a passed detection, and if so, store the OPC UA data in a cache queue, and decode the OPC UA data to obtain the identified OPC UA data;

In an optional implementation, the second mapping module is further configured to perform protocol conversion on the identified OPC UA data, and the obtained MMS data includes:

The identified OPC UA data is encapsulated according to the MMS data format to obtain MMS data;

Perform integrity verification on the MMS data to obtain a third verification result;

Determine whether the third verification result is data complete, and if so, cache the MMS data.

In summary, the present invention provides a data conversion method and device for primary equipment of a power system based on IEC61850, which collects sampling data of primary equipment of a power system; the sampling data is encapsulated according to the OPC UA standard of the application layer to obtain Encapsulated sampling data; encapsulate the encapsulated sampling data according to the TSN standard of the data link layer to obtain OPC UA data, which can provide clock synchronization, resource reservation and deterministic scheduling for SV data, thereby effectively achieving Convert SV data to OPC UA data; perform protocol identification on the OPC UA data to obtain the identified OPC UA data; perform integrity verification on the identified OPC UA data to obtain the first verification result; When the first verification result is that the data is complete, protocol conversion is performed on the identified OPC UA data to obtain MMS data, and the SV data is converted into MMS data that can be recognized by IEC61850 based on OPC UAOver TSN technology, and no Destroying the transmission architecture of the original IEC61850 provides guarantee for the collection and transmission of SV data, and improves the execution efficiency of MMS data, thus improving the real-time and reliability of SV data transmission.

Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the literal scripting language JavaScript.

The invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in one process or multiple processes of the flowchart and/or one block or multiple blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

Although the preferred embodiments of the present invention have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are apparent. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (6)

1. The data conversion method of the primary equipment of the power system based on IEC61850 is characterized by comprising the following steps:

sampling data of primary equipment of an electric power system is collected, wherein the sampling data is SV data, and the SV data comprises equipment attributes, equipment labels, voltage, current and protection action information;

mapping the sampling data from an OPC UA standard conforming to an application layer to a TSN standard conforming to a data link layer to obtain OPC UA data, wherein the mapping is direct mapping, and the direct mapping is that the data is directly mapped to the data link layer from the application layer without passing through a transmission layer and a network layer;

mapping the OPC UA data into MMS data;

the mapping the OPC UA data to MMS data includes:

performing protocol identification on the OPC UA data to obtain identified OPC UA data;

carrying out integrity check on the identified OPC UA data to obtain a first check result;

judging whether the first check result is complete data, if so, carrying out protocol conversion on the identified OPC UA data to obtain MMS data;

the protocol conversion is carried out on the identified OPC UA data, and the obtaining of MMS data comprises the following steps:

encapsulating the identified OPC UA data according to an MMS data format to obtain MMS data;

carrying out integrity check on the MMS data to obtain a third check result;

and judging whether the third checking result is complete data, if so, caching the MMS data.

2. The method for converting data of IEC 61850-based primary equipment of power system according to claim 1, wherein mapping the sampled data from OPC UA standard conforming to an application layer to TSN standard conforming to a data link layer, to obtain OPC UA data comprises:

encapsulating the sampling data according to the OPC UA standard of the application layer to obtain encapsulated sampling data;

and packaging the packaged sampling data according to the TSN standard of the data link layer to obtain OPC UA data.

3. The method for converting data of primary equipment of an IEC 61850-based power system according to claim 1, wherein the performing protocol recognition on the OPC UA data to obtain the recognized OPC UA data comprises:

carrying out integrity check on the OPC UA data to obtain a second check result;

judging whether the second checking result is complete data, if so, carrying out protocol detection on the OPC UA data to obtain a detection result;

and judging whether the detection result is passing or not, if so, storing the OPC UA data into a cache queue, and decoding the OPC UA data to obtain the identified OPC UA data.

4. An IEC 61850-based data conversion device for primary equipment of an electric power system, comprising:

the data acquisition module is used for acquiring sampling data of primary equipment of the power system, wherein the sampling data is SV data, and the SV data comprises equipment attributes, equipment parameters, voltage, current and protection action information;

the first mapping module is used for mapping the sampling data from the OPC UA standard conforming to the application layer to the TSN standard conforming to the data link layer to obtain OPC UA data, wherein the mapping is direct mapping, and the direct mapping is that the data is directly mapped to the data link layer from the application layer without passing through a transmission layer and a network layer;

the second mapping module is used for mapping the OPC UA data into MMS data;

the second mapping module is further configured to:

performing protocol identification on the OPC UA data to obtain identified OPC UA data;

carrying out integrity check on the identified OPC UA data to obtain a first check result;

judging whether the first check result is complete data, if so, carrying out protocol conversion on the identified OPC UA data to obtain MMS data;

the second mapping module is further configured to perform protocol conversion on the identified OPC UA data, where obtaining MMS data includes:

encapsulating the identified OPC UA data according to an MMS data format to obtain MMS data;

carrying out integrity check on the MMS data to obtain a third check result;

and judging whether the third checking result is complete data, if so, caching the MMS data.

5. The IEC 61850-based data conversion apparatus of the primary device of the power system according to claim 4, wherein the first mapping module is further configured to:

encapsulating the sampling data according to the OPC UA standard of the application layer to obtain encapsulated sampling data;

and packaging the packaged sampling data according to the TSN standard of the data link layer to obtain OPC UA data.

6. The IEC 61850-based data conversion device of power system primary equipment according to claim 4, wherein the second mapping module is further configured to perform protocol identification on the OPC UA data, and obtaining the identified OPC UA data includes:

carrying out integrity check on the OPC UA data to obtain a second check result;

judging whether the second checking result is complete data, if so, carrying out protocol detection on the OPC UA data to obtain a detection result;

and judging whether the detection result is passing or not, if so, storing the OPC UA data into a cache queue, and decoding the OPC UA data to obtain the identified OPC UA data.